* {
    margin: 0;
    padding: 0;
}

.big {
    margin-top: 200px;
    padding: 0 15%;
    position: relative;
}

.big .banner img {
    height: 500px;
    width: 100%;
}

.big .banner>div {
    position: absolute;
    top: 400px;
    left: 20%;
    background-color: #ffffff;
    border-radius: 20px;
    padding: 12px;
    cursor: pointer;
}

.top {
    font-size: 45px;
    margin: 40px 0;
    text-indent: 1em;
    font-weight: 1000;
}

.functions {
    width: 100%;
}

.function {
    display: flex;
    justify-content: space-between;
    width: 100%;
    height: 500px;
    box-sizing: border-box;
    flex-wrap: wrap;
}

.function .left-f {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.function .left-f .left-b {
    display: flex;
    justify-content: space-between;
}

.function .right-f {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.function .item {
    border-radius: 20px;
    background-size: cover;
    cursor: pointer;
    background-position: center;
    overflow: hidden;
    position: relative;
}
.function .item:hover img{
    transform: scale(1.5); /* 放大到1.2倍 */  
}
.function .item .text {
    text-align: right;
    position: relative;
    color: #ffffff;
    font-weight: 1000;
    font-size: 30px;
    right: 10%;
    top: 70%;
    z-index: 1;
}

.function .item img {
    z-index: 0;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    transition: transform 0.8s ease-in-out; 
    transform-origin: right bottom; 
}

.functions .butt {
    text-align: right;
    color: #ccc;
}

.old ul {
    list-style: none;
}

.old ul li img {
    width: 30px;
    background-color: #ffffff;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 10px;
}

.old ul li {
    display: flex;
    justify-content: space-between;
    padding: 10px 40px;
    margin: 20px 0;
    border-bottom: 1px solid black;
}

.old ul li .text {
    display: flex;
    column-gap: 10px;
}

.old ul li a {
    display: flex;
    align-items: center;
    background-color: #fdf891;
    border-radius: 10px;
    padding: 10px;
    font-weight: 1000;
}

.old ul li a:hover {
    background-color: #f6f4d3;
    color: purple;
}

.old ul li .text .left {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}